TestExpandableBuffer.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.hc.core5.http.impl.nio;


import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

class TestExpandableBuffer {

    @Test
    void testBasics() {
        final ExpandableBuffer buffer = new ExpandableBuffer(16);
        Assertions.assertEquals(ExpandableBuffer.Mode.INPUT, buffer.mode());
        Assertions.assertFalse(buffer.hasData());

        buffer.setInputMode();
        buffer.buffer().put(new byte[] { 0, 1, 2, 3, 4, 5});
        Assertions.assertTrue(buffer.hasData());
        Assertions.assertEquals(6, buffer.length());
        Assertions.assertEquals(16, buffer.buffer().capacity());
        Assertions.assertEquals(ExpandableBuffer.Mode.OUTPUT, buffer.mode());

        buffer.setInputMode();
        buffer.buffer().put(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
        Assertions.assertEquals(16, buffer.length());
        Assertions.assertEquals(16, buffer.buffer().capacity());
        Assertions.assertEquals(ExpandableBuffer.Mode.OUTPUT, buffer.mode());

        buffer.setInputMode();
        buffer.ensureCapacity(22);
        buffer.buffer().put(new byte[] { 0, 1, 2, 3, 4, 5});
        Assertions.assertEquals(22, buffer.length());
        Assertions.assertEquals(22, buffer.buffer().capacity());
        Assertions.assertEquals(ExpandableBuffer.Mode.OUTPUT, buffer.mode());

        buffer.clear();
        Assertions.assertEquals(ExpandableBuffer.Mode.INPUT, buffer.mode());
        Assertions.assertFalse(buffer.hasData());
        Assertions.assertEquals(22, buffer.capacity());
    }

    @Test
    void testAdjustCapacity() {
        final ExpandableBuffer buffer = new ExpandableBuffer(16);
        Assertions.assertEquals(16, buffer.capacity());

        buffer.ensureCapacity(21);
        Assertions.assertEquals(21, buffer.capacity());
        buffer.ensureAdjustedCapacity(22);
        Assertions.assertEquals(1024, buffer.capacity());
        buffer.ensureAdjustedCapacity(1024);
        Assertions.assertEquals(1024, buffer.capacity());
        buffer.ensureAdjustedCapacity(1025);
        Assertions.assertEquals(2048, buffer.capacity());
    }
}